Old snowmobile history books and magazines are filled with pictures of racing champions standing next to Gaetan “Chester” Duval. That’s because the Quebec native was very often the main man behind the equipment that carried them to the waving checkered flag. An inventor, designer and builder, he concepted the 1979 Ski-Doo Super Stock and Sno Pro race sleds before completely overtaking oval racing’s top class with his Formula I Twin Track design. The engineering marvel was so dominant that no other brand would challenge it. Duval also served as the title-winning Ski-Doo race director from 1980 to1990.